胆管癌的危险因素包括().
A.原发性硬化性胆管炎
B.吸烟
C.先天性肝内胆管扩张(CarolidiseasE.
D.华支睾吸虫感染
E.胆总管囊肿
参考答案:A, C, D, E
A survey of the opinions of experts ________ that three hours of outdoor exercise a week ________
good for one's health. [ ]
A. show; are
B. shows; is
C. show; is
D. shows; are
胆囊或胰腺超声检查前应禁食
A.4小时
B.8小时
C.12小时
D.24小时
E.2天